Incandescent-lamp structure



' 1,637,786 J. J. REKAR 4 INCANDESCENT LAMP STRUCTURE Filed Feb. 15. 1926 V mmvmn,

' A ORNEY.

Patented Aug. 2, 1927.

- UNITED sia'ras 'JAY J. REKAR, OF LOS ANGELES, CALIFORNIA, ASSIGNOR .TDiDE LUKE LAMPIMFG. 5

I 00., E, LOS'ANGELES, CALIFORNIA, A CORPORATION OF CALIFOBNIA moANnnscEn'r-LAMP smnuo'ruan.

Application filed February 1 5 .1926. Serial No. 88,381. V

Thisinvention relates to lamp structures and more particularly to types of lamps in which incandescent lamp bulbs are mounted detachably' in sockets ;generally, screw- 5 threaded. i

As is well known, the common commercial lamp bulb has its neck merely gripped in a bed of cement in its threaded base andtheree fore there is no firmer connection of the glass to its base than. the. mere bond of cement. Consequently there is a very materialloss of lamps in use directly caused by the breaking down of the cement bond uniting-the bulb neck and the base, and as such a cause of failure is considered as a detective lamp the manufacturer is called upon to, and does, m ake. good this loss=to the buyer by replacement. This is a. serious matter. of

finances when the bulbs are of the higher power type costing the buyer from $6.00 up. There are .several causes for the-breaking down of the cement bond holding the neck of the bulb. ..,One is due .to-lateral pressure appliedoccasionally from onecause or an;

5 other-,.or constant pressure laterally by gravi ty acting with much leverage upon the, lamp base when the axis ofthe installed lampis much .out of. a Vertical line; Anqthercause is. vibration of the bulb from anyv sourceand inany position of ,the buIb QA third and verycommon cause of thebreaking down; of the cementis the rather ihighdegree of heat generated by the lamp and. which, @theabsence oiproperventilationofthe'lamp-strue tureandlsocket,destroys the cohesion of the shellac cement and ,this lets-goof the .bulb neck, so that the bulb breaks away entirely fromthe base or isheld merelyv thelead in wires of the filament. jj 40 In. some fof the high-grade, high-power lamps now on the market an interior heat battle .is arranged: at. the intersection of the pear shaped bulb andthe neck. And 'va- 'rious mean s. .haveybeen proposed to; grip thelbaseinthe socket to prevent loosening of the base in its mount. But this last means is, wholly. ineffective .to .prevent. strain. of

the bulb upon the cement bed? 1 My present Invention has many objects which. will be mademanifestin the ensuin'g specification of. apparatus embodying the principles of the invention; ita beingundere stood that modifications,.vari ationsand ;ad;- aptations may be, resortedgtowithin-the spirit and scope of the'invention" as is here claimed.

Among the several objects the following are here-briefly rnentionedz+theprovision v V of means togrip the glass body of the'lamp and to take some of-thelateral strain from 5 the cement in the lamp base, especially, when the, bulb is inclinedfout of the vertical and atjthe same time to steady-the bulb against undesired vibrations which tend; not only to loosen the base in the socket threads but, with more serious consequences, to. break down the cementhold on the neckend. The bulbholding means hasthe further function ofv reflecting downward or,out;ward a considerable-portion of light rays, and furtherniiore, has the v purpose of throwing voff or deflc ctingfmuch heat vthatqwould affect the basegandsocket.and whichfrfiquently melts the lead spot?f. holding the base terminal oflalealdinito the filament: Such an. event isfattendedwith serious consequences when the bulb; is use in thereapeutic. apparatus because fjtheiinelting of the ,terminalspot genei allyjresults; in; perforating the proxi-v matezone oi the very thin glass-necks, When ,qperiorated the bulb explodes; and the fragments may. shower upona patient being treated. 1 a

An embodimentof the invention is illus tratedin the accompanying drawings wheree 1112-15 i Figurecl is a central vertical section'of thezinvention as incorporatedin a commer= cial, thereapeutic lamp. utilizing astandard 1000' w.115 v. light unit or incandescent @Figure 2 is. an elevation-of the fragment-eta lamp bulbi' a z Figure 3 -is -a plan-of a spider for connecting par-ts, a {Figured is a perspective of a bridge mem her. ,Figure '5'.is- --a perspective of'the bulbholdingy;light-reflecting and :heat deflecting device. Figure 6- is-a bottomplan of a segment ofthe lamprefiector;showing a screen latch; a-Inthepresent disclosure a mogul socket S is designed .to receive a lamp base B of'a pea-r shaped bulborlamp L. The'u sual' lead contactspot; O is-shown'in Fig; 2'for a lead-in; wire =VV from the metal screw basev B. In lamps of this character theneck of base and IOU the bulb is held. inthe base only by adhesion v of cement X. Heat and strains readily rupture this band of cement and the bulb is loosened and of no use.

.11 provide ineansr preferably rigidly associated with. the socket S to engage a part of the glass bulb and eliminate its vibration as to its socket and to so grip-orsupport the bulb as to reduce or obviate side strain of its weight upon the cement inthe base. The

holder is designed toyieldingly support the glass so as to allowt'or expansion and for disalign nent .of the bulb as to the socket.

The socket S is here attached'to and by a bridge 22 which is fastened by bolts 3' to a ringfl ange 4 offa parabolic reflector 5}; the

low. the flange so that the hot air rising from,

flange "forming a circular mouth around a lamplneck inserted in the socket S.

The mouth partlof the reflector 5 is providediwith a series of air outlet holes 6 bethe lamp may readily pass out and away from the neck of the lamp... y

To cause the positive deflection of the heat and at the same time to steady and support I the bulb of the lampl provide the above referred to means andarrange it in rigid asso ciation withfthe socket. In its present form this means includes a device having a part'or parts surrounding the smallerior neck portion ofthe bulbat a considerable distance from 'rocast back light rays theflamp a reflecting coll'ar arrangement 9* is provided at the lamp gripping part of the devicei may be kerfed" at 10 to This collar, here shown, is integral with the tube 7. In such casethe tube and" collar the gripping parts-z It will be seen, therefore, that the lamp is supportedby theholder in such a manner that if the axis of the bulb is not vertical the constant side leverageburden 'is takenoff of the cement by the remote effective supportingypart: engagingthe lower side of the tilted neck.

' It understood:- that bulb gripping means mayzbe' associated with various standard or stock reflectors, or with any special equipment', more especially with equipment in which the bulbs are used 01' mounted with axes: out of: the verticali and in which the grauity moment is efiect-i ve' on the cement whieiieth'e bulb hangs in an inclined posi tion: from; itssocket the heat ascends toward the socket. and heats it up.

allow yielding of In therapeutic lamps I. cover. the reflector 5 with a canopy A coniorminggenerally t0 the form of the reflector, from which it is spaced to allow cool air to pass up between the canopy and the reflector; This fiowof air actsi-nductivelyto draw the hot air out through the reflector vents 6.

The-canom top has an annular shoulder 11 and a spider ring 12 has arms 13 fastened on the shoulder. The ring 12 is bolted, with the bridge feet and the tube 7, on the flange 4 of the reflector; the shoulder ll forming a wide annular. air channel around the top of the reflector. i

A dome 15 has its bottom centered and supported bythe canopy shoulder 1'1 -and extends to the top of the bridge 2,,to which. it is removably attached by a central screw 17. The dome has ample vent holes 18 for therapidescaym of hot air coming up from the energized lamp-bulb. The rapid escape of air from thecanopyand. the reflector constantly carries 0a heat from the sockets; i There is so much danger of. infiicting im jfury upon patient by the bursting on 15:11:15- ing of a bulb that glass plate guards have been resorted:- to and mountedbelow the bulb in some lamps... But this expedient only increases the danger because the proper ventie lation of the lamp is not possible and heat-j ing is intensified; To obtainsafety and ventilationi, I" provide a fora'minous screen 20 ofb'asket term setting up inthecanopy' and d'etachabl'y resting upona set of lugs or screws 21 and a releasing spring" latch 22; which devices are provided in the skirt of the refle'ctor. i V

What ishlaimedi is:

11A lamp structure including a: canopy having a ventilated upper portion, a reflector mounted in the canopy and venting outward thereto, a lamp: socket in the upper part of the canopy, anda device for defiect-ing'hot air outwardly through the refiector and away from the lamp base socket. 2.. A lamp structure including a" canopy having a ventilated upper portion, are flect'or" mounted in the canopy and venting outward thereto, a lamp socket in the upe per part of the canopy,.arnd1 a device for defleeting; hot air outwardly through the re: flectorand" away fromthe lamp socket and eng geable with an. applied lamp: bulb to steady it A A ventilated; reflecting lamp". structure including an, inner, outletted reflector, a ventilated dome abovethe: outlet of the space in the-- reflector, *a bulb basef socket, and a bulb holder rigidly fixed in the re" fi ector' for holding, an applied bulb against strain when the structurefis tilted. 4. A ventilated; l ampl structure including concentric canopy and-reflector members forming an" air passageway fa bulb anda base, in which itis cemented, asooket for said base, having mounting means fixed in the upper part of the canopy, means, in the reflector, having a part engageable with the neck of the bulb and whereby, when the bulb is in an inclined position, the strain of its weight is taken off the base cement; said bulb engaging means having a deflector to throw hot air outward from the lamp to said passageway.

5. A reflecting lamp structure including a canopy having a ventilated top, a reflector spaced from and mounted in the canopy and having vent holes out to the canopy space for air escape to the top, and a tubular air deflector closing the top of the reflector;

above the vent holes and diverting hot air from an applied lamp bulb.

6. A lamp structure including a canopy having a ventilated top, a reflector spaced from and mounted in the canopy and having vent holes for escape of airto the canopy top, and a bulb holder for deflecting hot air from the base of the bulb and having a light reflecting portion to cast back light from the bulb and closing the top of the reflector around the bulb.

7 A lamp structure including a canopy having a ventilated top, areflector spaced from and mounted in the canopy and having vent holes to the canopy top, and a tubular air deflector adapted to receive the neck of a bulb and closing the top of the reflector above the vent holes; said deflector forming an air space around the neck of the bulb and in direct communication with the top chamber.

8. In a lamp structure, a lamp socket, and

means including a converging tube having a girdle to engage the glass of an incandescent bulb in the socketand to protect the socket and lamp base from heat, and the girdle having a flared collar portion for refleeting light coming from the lamp.

9. A lamp reflector and a socket arranged axially therewith, and a heat deflector closing the top of and coaxial with the reflector and having a central orifice to receive the neck of a lamp bulb in the socket, said deflector having a part engageable with the neck of the bulb to support it in an inclined position and reduce strain upon the bulb base cement; said reflector having vent holes below its closed top.

JAY J. REKAR. 

